Type-writing machine.



A. G. P. KUROWSKI.

TYPE WRITING MACHINE.

APPLICATION FILED JUNE 1a, 1914 1,128,612, Patented Feb. 16, 1915.

3 SHEETS-SHEET 1.

N mvENTom ATTO N BY.

A. G. F. KUROWSKL,

TYPE WRITING MACHINE.

APPLICATION FILED JUNB18,1914.

1,128,612, Patented Feb.16, 1915.

8 SHEETS-SHEET 2.

FIG. 2.

WETNESSES: INVENTOR.

43ml) Wj/ WU' W122 BY 5/ I ATTO "-(EY.

A. G. F. KUROWSKI.

TYPE WRITING MACHINE.

APPLICATION FILED JUNE18,1914

1,128,612, Patented Feb. 16, 1915.

3 SHEETS-SHEET 3.

UNITED STATES PATENT OFFICE.

ALFRED G. F. KUROWSKI, OF NEW YORK, N. Y., ASSIGNOR TO UNDERWOOD'IYPEWRITEB COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

TYPE-WRITING MACHINE.

Specification of Letters Patent.

Patented Feb. 16, 1915.

T all whom it may concern.

Be it known that I, ALFRED G. F. KURow- SKI, a citizen of the UnitedStates, residing in Brooklyn borough, in the county of Kings, city andState of New York, have invented certain new and. useful Improvements inType-Writing Machines, of which the following is a specification.

This invention relates to improvements in typewriting mechanism forwriting upon stencil cards, although it may be used for various otherpurposes.

The stencil card usually comprises aframe and a body portion consistingof thin paper, treated for typewriting stenciling purposes. The frame isusually made of cardboard or heavy paper. In writing the stencil uponthe typewriting machine, it is desirable to silence the ribbon vibratingmechanism f' the typewriter so that the types can strike directly uponthe stenciling paper, in order to cut the stencil sharply. t is also,however, desired to write upon the frame itself.

In writing on these cars, it is usual to insert thecard 1n the tpewriter and then write, through the usuai ribbon mechanisimupon theframe of the card, and then silencing the ribbon vibrating mechanism andwriting upon the stencil.- Aftor withdrawing the card, the ribbonmechanism is again adjusted by the operator to be effective at the typestrokes, so that the frame of the next card may be written upon, andthen the operator must cast off the ribbon mechanism again in order towrite upon the stencil itself.

One of the main objects of theinvention 'is to relieve the operator ofthe necessity of remembering to cast off and restore the ribbonsilencing mechanism for every sten oil, and to avoid mistakes that arelikely to occur if the operator forgets to attend to these duties, andalso to save the time and effort required for manipulating the ribbonsilencing and restoring mechanism for every stencil card.

In carrying out my invention, there 1semployed a card holder mountedupon the typewriting machine into which the card 15 caught. preparatoryto writing. thereon; the card holder being movable after the-card isinserted therein to bring the card into sition for writingupon theframe, pre er abDy the top bar or rail" of the frame. The

ribbon silencing and! restoring mechanism: is;

jumps up above theprinting int. vibrant condition is maintained:

connected to be operated by this card holder, so that when the card isinserted and the card holder is moved to carry the card into positionfor writing on the top bar-of the frame, the ink ribbon is therebyconnected up to operate upon the ty e strokes. But when the line-spacingmee anism, or other 7 device, is operated to advance the card inline-spacing direction so that types may be -made upon the stencilitself, the ribbon mechanism is automatically silenced so that the typesprint directly .upon the stencil.

In carrying out the invention, there is preferably employed a cardholder invented by Jesse A. B. Smith, this card holder being supportednormally independently of gages" the ribbon vibration control mechanismto vibrate the ribbon, andiholds the ribbon invibration duringthewritingof the entire line, the ribbonvibration'control mechanism being mountedon the frame of the typewriter, and the platen and card holder beingmounted on the paper carriage;

but the connections being made for the card holder to hold the ribbonmechanism in operative condition during the writing of the entire lineon the top of the stencil card; frame. As soon as the platen isline-spaced or advanced, the operator releases the ribbon vibrationcontrol mechanism which then returns to normal position, silencing therib bon. As usual in the Underwood t writing machine, the ribbon isnormal y below the printing line, but at everytype stroke it This In mydevice, during the writing of one or we lines, on the top bar oftheframe, but after the platen is advanced so far that writing may bedone upon the tbinstencil' body,- the mechanism is released from thecontrol oi the card holder, and returns to the ribbon silencingposition, so that the ribbon does not vibrate up and down atthe typestrokes, and hence, the types may cut the stencils sharply. f

In one .form of the invention as illustrated in the drawings, abell-crank is mounted upon the machine frame having an arm to actuatethe ribbon controlling mechanism, and having another arm to be actuatedby said card holder on the carriage; there being provided on thecarriage, a lon bar which is swung back by the card hol or to engage awrist provided on said bell-crank, and thereby hold the bell-crank innormal position during the travel of the carriage, by being engagedalong the bar, said bar being of the length of the stencil card itself.This ribbon shifting bar on the carriage is itself operable by the rackbar provided upon the card holder and meshing with a pinion carried bythe platen, the bottom end of the rack striking an arm or cam providedupon said bar.

Other featuresand advantages will hereinafter appear. I

In the accompanying drawings, Figure 1 is a perspective front elevationof a typewriter'carriage provided with a stencil or card holder, theconnecting means for operating said holder with the platen rotation, andcertain portions of the mechanism whereby the ribbon vibrating mechanismis controlled in the operation of said card holder.- Fig. 2 is a sideelevation showing the typewriter frame outlined, and certain of thecooperating parts including a typebar, and platen shifting mechanism, inconjunction with the card holder operating means, the ribbon vibratingmeans, and the cooperation between the ribbon vibrating mechanism andthe mechanism controlling the card holder; this view showing the cardholder mechanism prior to'lowering the card holder across the platen forwriting the first line thereon. Fig. 3 is a detail in side elevation ofthat portion of the mechanism employed in operating the card holder andin controlling the ribbon mechanism thereby; this view showing the cardholder mechanism as movedto support the card holder across the platen inreadiness for writing the first line, and also showing the ribbonvibrator as thrown into operative position. Fig. 4 is an enlargeddetailof a portion of the ribbon vibrating mechanism. Fig. 5 is a detail sideelevation of the line-spacing mechanism. Fig. 6 is a detail sideelevation partly in section, showing a type-bar striking'the platen overthe upper frame portion of a stencil work-piece for upper case, theholder being in the first position. Fig. 7 is a corresponding viewshowing the card holder advanced to the second position, here operatingin lower case upon the stencil portion of the work-piece. Fig. 8 is asimilar view showing the card holder advanced to the last position forwriting the last line upon the stencil.

The invention is herein illustrated as applied to an Underwoodtypewriting machine, although, obviously, it is applicable to othertypewriting machines.

The drawings show a portion of the frame of a typewriting machinedesignated by the numeral 1, also the carriage 2, the platen frame 3'and the platen 4 supported in said frame by its axle 5, which has theusual finger piece 6 and line-space wheel 7, said line-space wheel beingoperated by a pawl 8. The usual ribbon vibrating mechanism is also showncomprising a rock shaft 9 extending rearwardly through the machine fromthe front portion of the frame, the shaft being connected at its rearend to an arm 12 extending therefrom, a pivotal link 13 pivotallyconnecting said arm to an actuator 14, which is adapted to slidelongitudinally upon a plate 15, said actuator being connected with saidlink by a stud 16 working in a slot 17; said actuator having a forwardlyextending lug 18 with a vertical slot 19 to permit play therein of awrist 20, which extends from a lever 21 pivoted to a bracket 22, carriedby a rail 23, said lever continuing forwardly into a goose neck 24 whichconnects with a ribbon vibrator 25. These parts of the ribbon vibratingmechanism, in conjunction with a universal frame 26, are substantiallyas used in the Underwood typewriting machine and necessarily illustratedherein because of their cooperation with my improved means forautomatically actuating said ribbon vibrating mechanism in the operationof a stencil holder. v

The stencil holder complementary to the present example of thisinvention, is, as stated, that shown in the invention of Jesse A. B.Smith, and comprises the fingers 27 carried by a strip or bar 28, whichis held in operative relation with the platen by racks 29 at oppositeends of said bar, said racks meshing respectively with gear wheels 30connected at the opposite ends respectively of the platen to rotatetherewith, the racks having pins 31 to ride in slotted guideways 32 toguide said racks in a curved path so that the fingers 27, which havehoops or catches 33 at their lower ends to support a work-piece, may becarried in a curved path across the platen surface.

It will be understood that a work-piece, such as a stencil sheet havinga surrounding frame, when supported in the holder consisting of thefingers 27, may be carried downwardly across the printing surface of theplaten through the action of the gears 30 and racks 29 in the rotationof the platen, until the top bar of the frame lies over the printingsurface in position to be struck by the types; and the holder actuatingmechanism may, as stated in said stencil holder in vention, have itsrotating movement limited in one direction to so present the top bar ofthe stencil work-piece to the types, and may also be limited in itsmovement in the other direction in advancing a work-piece across theplaten for line-spacing, that it may not be rotated beyond the pointwhere the last line may be written upon said work-piece.

Since the purpose of the invention is to further facilitate theoperation of writing on a stencil having edge-inclosing frames where itis desired to write in ink upon the upper bar of the frame and to cutthrough thestencil sheet with the bare type, my invention consists ofmeans which I will now describe, whereby the act of moving a holderofthe aforesaid character downwardly across the platen to position forwriting upon the upper bar of the stencil workpiece, automaticallythrows the ribbon vibrating mechanism from a normal neutral position tothe operative vibrating position, whereby while actuating the types forwriting upon said upper bar, the ink ribbon will become interposedbetween the types and the work-piece at each stroke in the usual manner,and also whereby, when the holder has been advanced in line-spacing forone or two lines, as may be considered desirable, in order to clear thetop bar of the frame and bring the stencil portion of the work-pieceover the printing line on the platen, in that advance act the ribbonvibrating mechanism will have been automatically silenced, the types,therefore, will strike directly upon the stencil portion of thework-piece.

In accomplishing the results set forth, it is desirable that the shaft 9be normally held, as by a spring 34, to retain the ribbon vibratingmechanism silenced, because the major portion of the work accomplishedon the stencil sheet is without the use of ink ribbon, and therefore thespring 34 will hold said shaft 9 and the finger key 35 at neutralposition, the finger key 35 representing the rocking movement of therock shaft 9 in one direction to cause the ribbon to 'vibrate to andfrom the printing point.

To maintain the shaft 9 in the neutral position relatively to theribbon-vibrating mechanism, I provide a pivotal arm 36 having a camsurface 37 in engagement with a pin 38 extending from the finger-key 35,the spring 3-1 urging said arm in the direction of said pinover the camsurface 37, which, being at an upward inclination, causes the pin tobecome seated by said spring in a hooked portion 40 at the top of saidcam, thereby holding the shaft 9 and finger keys 35 at neutral. When itis desired to cause the ribbon-vibrating mechanism to operate, theneither the key 35 may be depressed against the spring 34 to thereby rockthe shaft 9, or said shaft may be rocked automatically by the cardholder in the manner to be now described: Located beneath one of theracks 29, here shown as the right-hand rack. is an arm or cam 41 mountedon a rock shaft 42 journaled in bearings 48 supported by the platenframe below the platen, said arm or cam lying in the downward path oftravel of the said rack 29 to be engaged by the end of said rack nearthe limit of its downward travel, and to rock through the final portionof the downward travel of the rack, a bar 44 of suitable lengthextending from said rock shaft 42 to rock therewith and actuate theribbon-vibrating mechanism. Also mounted upon the rock shaft 42 is aguide for the rack 29 to receive the lower end of said rack as itapproaches the arm or cam 41, and to direct the end of said rack intooperative contact with said arm or cam. Said guide, which may consist ofa bar 45 with shaft-engaging lugs 46, serves at its rear portion as astop for the arm or cam 41, which is pressed thereto in the normalposition by a spring 47 operating upon the rock shaft 42. The arm or cam41 is arranged so that when the holder carrying a work-piece is moveddownwardly across the platen surface, the rack 29 will strike said camor arm 41, when the upper portion of the work-piece, as the top bar ofthe stencil frame, enters the printing zone, and by the continueddownward movement of the rack to its lower limit, said arm or cam iscarried downwardly and held depressed, and the upper portion of the topbar of the work-piece frame is presented to the action of the types.Obviously, upon retracting the holder in its line-spacing direction, therack 29 will leave the arm or cam 41 at the same point in its travelwhere it had first made descending contact therewith, whereupon thespring 47 will retract said arm or cam and said bar 44.

The parts above referred to, being located upon the carriage, areintended to cooperate with other parts upon the machine frame for theautomatic operation of the ribbonvibrating mechanism.

Mounted upon the machine frame, as by pivots 48, is a bell-crank leverhaving arms 49, 52, the arm 49 extending laterally and forwardly of themachine and having a wrist 51 lying in the path of movement of the bar44, the other arm of said lever extending forwardly and terminating in afinger 53 in engagement with a tooth or projection 54 upon the rockshaft 9, to be capable, in the movement of said bell-crank lever ofrocking said shaft 9 from its normal neutral position to a' positionwhere the ribbon-vibrating mechanism, through the intermediateconnections aforesaid, becomes operative with the action of the fingerkeys.

As will be gathered from the foregoing description of parts and theirarrangement, the machine is normally operative with the ribbon vibratingmechanism silenced, the shaft 9 therefor with tooth 54 and fingerkey 35being held rocked in the neutral position by means of the spring 34, therack 29 being out of engagement, with the cam 41 for the writing to beperformed with bare type upon the stencil sheet. But when the work-pieceholder has been carried downwardly a sufiicient distance to resent thetop bar of its frame for ink wrlting thereon, through the action ofgears 30 upon racks 29, then one of said racks will have engaged the cam41 and rocked it with the bar 44, so that said bar in any letter-feedingposition of the carriage within the width of the work-piece, Wlll engagewith the wrist 51 in the rocking action communicated to said bar in themanner aforesaid, to shift said wrist 51 and arm 49 rearwardly upon thebell-crank pivot, whereby the other arm 52 of the bellcrank is shiftedto press its finger 53 against the tooth -54 to thereby rock the rod 9out of neutral position, and into the position against the tension ofthe spring 34, where the link 13 shifts the actuator 14 to engage withthe wrist 20, whereby in the well-known manner, the ribbon vibratingmechanism is rendered operative.

The work-piece is adapted to receive writing thereon in ink (as on thetop bar of the stencil frame) during the continuation of the contactingrelation between the rack 29 and cam 41, and this arrangement may coverthe operation for an extent of vertical movement of said rack equal toone, two, or more lines of writing accordin to the length of the rack 29or the re ative arrangement between said rack and cam, it being apparentthat as soonas the rack 29 leaves its engaging contact with the cam inretiring therefrom with the further linespacing movement of the platenand holder, said cam and bar 44 will be restored to normal position bythe spring 47 whereupon the ribbon vibrating mechanism will be silencedin the manner described, and further writing may proceed without theintervention of the inked ribbon.

As the introduction of the work-piece is accomplished by movin the racks29 downwardly to the limit al owed their pins 31 in the slots 32, whichallows for the cam engagement by the rack 29 referred to, so the upwardor line-spacing movement of the holder is limited by the travel of thepins 31 to the upper termination of said slots 32, and the operator,therefore, in inserting a work-piece and in writing thereon to the fullextent available, is guarded from overthrow in either direction, andfurther, is not required to pay attention tothe means for silencing andrestoring the ribbon vibrator, because these means are actuatedautomatically in the operation of the ribbon mechanism.

While the extent of writin space in line -v spacing direction is setaccor ing to the construction of the apparatus, work-pieces of differentwidths may be employed to vary their capacity in letter-feedingdirection, for which purpose, the width of the work piece holder may bealtered by spacing the fingers 27 variable distances apart upon theirsupporting bar 28; said fingers 27 belng adjustably secured to said barfor such purpose as by set screws 55. The typebars 56 have heels 57 toengage the universal bar 58 on frame 26, to shift said frame rearwardly,for return by spring 59, and to thereby cause the verticalreciprocations of the ribbon vibrator 25.

The platen frame is capable of shifting to upper case position in whichthe ribbon vibrating mechanism is equally controlled as when in normalor lower case position, the shift means comprising a platen-supportingrail .60 on the machine frame, the swinging brackets 61 carrying saidrail, and shift keys, as 62, with lever extensions 63 to actuate saidbrackets 61 in shifting the rail.

Variations may be resorted to within the scope of the invention, andportions of the improvements may be used without others.

Having thus described my invention, I claim:

1. In a typewriting machine having a platen and ribbon vibratingmechanism, the combination of a workpiece holder movable to carry awork-piece across the printing portion of the platen, and means operablewith said work-piece holder in its adjustment for the preliminary linesof writing to bring said ribbon vibrating mechanism into operativeposition.

2. In a typewriting machine having a platen and rlbbon vibratingmechanism, the combination of a work-piece holder movable to carry awork-piece across the printing portion of the platen, and means actuatedby said work-piece holder in its advance in line-spacing direction tosilence said ribbon vibrating mechanism.

3. In a typewriting machine having a platen and ribbon vibratingmechanism, the combination of a work-piece holder movable to carry awork-piece across the printing portion of the platen, and means actuatedby the movement of said work-piece holder in line-spacing directionafter a preliminary advance, to silence said ribbon vibrating mechanism.

4. In a typewriting machine having a platen and ribbon vibratingmechanism, the combination of a work-piece holder mounted to carry aworkpiece across the printing portion of the platen, and means operablewith said work-piece holder in its adjustment for the preliminar linesof writing, to render said ribbon vi rating mechanism operative, and tosilence said ribbon vibrating mechanism during the remainder of theline-spacing movement of said holder.

5. In a typewriting machine having a platen and ribbon vibratingmechanism, the combination of a work-piece holder movable through alimited range to carry a workpiece across the printing portion of theplaten, and means operated by said Workpiece holder in its line-spaceadjustment for the preliminary Writing to bring said ribbon vibratingmechanism into operative position, and to silence said ribbon vibratingmechanism for the further line-spacing movement of said holder.

6. In a typewriting machine for writing on stencils having a platen andribbon vibrating mechanism, the combination of a work-piece holdermovable to carry a workpiece across the printing portion of the platen,and means operable with said Workpiece holder in its adjustment forwriting on the upper bar of the stencil frame to render said ribbonvibrating mechanism operative that the writing may be in ink, saidribbon vibrating mechanism becoming i11- operative when the work-pieceholder has been advanced in line-spacing direction, to bring the stencilportion of the work-piece into printing position to be struck directlyby the types.

7. In a typewriting machine having a platen and ribbon vibratingmechanism, the combination of a work-piece holder movable to carry awork-piece across the printing ortion of the platen, means normallyholding said vibrating mechanism in neutral or inoperative position, andmeans controlled by said work-piece holder in its linespace adjustmentfor preliminary writing to render said vibrating mechanism operative,and to subsequently restore said vibrating mechanism to its neutral orinoperative position.

8. In a typewriting machine having a platen and ribbon vibratingmechanism, the combination of a work-piece holder movable to carry awork-piece across the printing portion of the platen, means normallyholding said vibrating mechanism silenced, and means operable with saidwork-piece holder in its line-space adjustment for the preliminarywriting to render said vibrating mechanism operative.

9. In a typewriting machine having a revoluble platen and ribbonvibrating mechanism, the combination of a workpiece holder, meanscommunicating the movement of the platen to said Work-piece holder tocarry a work-piece across the printing portion of the platen, and meansarranged to operate with said Work-piece holder in its advance inline-spacing direction to silence said ribbon vibrating mechanism.

10. In a typewriting machine having a revoluble platen and ribbonvibrating mechanism, the combination of a workpiece holder, meanscommunicating the movement of the platen to said workpiece holder, andmeans operat d by said workpiece holder in its line-space adjustment forpreliminary writing to render said ribbon vibrating mechanism operative,and to silence said ribbon vibrating mechanism during the remainder ofthe movement of the holder.

11. In a typewriting machine having a revoln'ble platen and ribbonvibrating mechanism, the combination of a workpiece holder movablethrough a limited range to carry a Work-piece across the printingportion of the platen, means communicating the movement of the platen tosaid holder, and means arranged to operate with said work-piece holderin its line-space adjustment for the preliminary writing to render saidribbon vibrating ntrechanism. op erative, and to silence said ribbonvibrating mechanism in the subsequent line-spacing movement of saidholder.

12. In a typewriting machine having a platen and ribbon vibratingmechanism, the combination of a work-piece holder, a spring to hold theribbon vibrating mechanism normally inoperative, and means operated bysaid work-piece holder in inserting a Work-piece for and duringpreliminary Writing thereon, to overcome said spring and render saidvibrating mecha nism o erative.

13. n a typewriting machine for writing on stencils having a revolubleplaten and ribbon vibrating mechanism, the combination of a spring tohold said ribbon vibrating mechanism normally silent, a work-pieceholder, means communicating the movement of the platen to carry saidholder across the printing portion of the platen, and means operated bysaid Workpiece holder to render said vibrating mech- 'anism operative atthe insertion of a workpiece and during its advance in line-spacingdirection for writing upon the upper frame portion of the stencil. thevibrating mechanism again becoming silent in the continued advance ofthe work-piece holder for writing upon the stencil portion of theworkpiece.

14. In a typewriting machine having a platen and ribbon vibratingmechanism, means normally holding said vibrating mechanism inoperative,a Work-piece holderadapted to reciprocate in the Work-piece insertingand advancing movements of the platen, and a bell crank adapted to movesaid vibrating mechanism into operative position, said bell crank beingcontrolled by the movement of said work-piece holder in inserting thework-piece and during the preliminary Writing thereon.

15. In a typewriting machine having a revoluble platen and ribbonvibrating mechanism, means normally holding said ribbon vibratingmechanism inoperative, a workpiece holder, means communicating themovement of the platen to said Workpiece holder to reciprocate thelatter in inserting and advancing a work-piece over the printing portionof the platen, a bell crank adapted to move said ribbon vibratingmechanism into operative position, a rock shaft having a bar engagingsaid bell crank, and a cam upon said rock shaft in the path of saidwork-piece holder to actuate the bell crank through said bar in themovement of said work-piece holder while inserting a work-piece andduring preliminary writing thereon.

16. In a typewriting machine having a revoluble platen and ribbonvibrating mechanism, means normally holding said ribbon vibratingmechanism inoperative, a workpiece holder, means communicating themovement of the platen to said work-piece holder to reciprocate thelatter in inserting and advancing a work-piece over the print ingportion of the platen, a bell crank adapted to move said vibratingmechanism into operative position, a rock shaft having a bar engagingsaid bell crank, and a cam upon said rock shaft in the path of saidworkpiece holder to actuate the bell crank through said bar in themovement of said work-piece holder While inserting a Workpieceand'during preliminary Writing thereon, the vibrating mechanism becomingsilent in the continued advance of the Work-piece holder after thepreliminary writing.

17. In a typewriting machine having a revoluble platen, the combinationof a Workpiece holder movable back and forth with the platen, ribbonvibrating mechanism, a controlling rock shaft for said mechanism, meansnormally .holding said shaft rocked in one direction with the mechanisminoperative, means for rocking said shaft oppositely to render saidmechanism operative, said shaft-rocking means including a tooth on saidshaft, and a bell crank, one arm of said bell crank engaging said toothwhile its other arm is engaged by said work-piece holder during theinitial portion only of the platen advance in line-spacin direction forpreliminary writing upon sai work-piece.

18. In a typewriting machine having a revoluble platen and ribbonvibrating mechanism, the combination of a controlling rock shaft forsaid mechanism, a tensional device to hold said shaft rocked in onedirection whereby said vibrating mechanism is normally silent, awork-piece holder adapted to reciprocate across the printing portion ofthe platen, a bell crank lever having one arm in engagement with saidrock shaft. and connections between said work-piece holder and the otherarm of said lever to operate said vibrating mechanism during a portionof the movement of said work-piece holder.

19. In a typewriting machine, the combination with a revoluble platenhaving a frame, of a work-piece holder mounted upon said platen frame,means connected to said platen and said work-piece holder forreciprocating the latter as the platen is rotated forwardly andbackwardly, ribbon vibrating mechanism, means holding said mechanismnormally silent, and means arranged to operate with said holder torender said vibrating mechanism operative during the initial portiononly of the forward movement of said work-piece holder.

20. The combination with a revoluble platen and platen frame, of gearson the ends of the platen, racks meshing with said gears, a work-pieceholder caused by said racks to move up and down, a normally inoperativeribbon vibrating mechanism, a rock shaft having means to control saidmechanism, and a cam on said rock shaft in the path of one of said racksto be actuated thereby and cause the rock shaft to render said vibratingmechanism operative while said rack and cam are engaged.

21. The combination with a revoluble platen and a platen frame, of gearson the ends of the platen, racks meshing with said gears, a Work-pieceholder caused by said racks to move up and down, means upon the platenframe to guide said work-piece holder, a normally inoperative ribbonvibrating mechanism, a rock shaft having means to control saidmechanism, and a cam on said rock shaft in the path of one of said racksto be actuated thereby and cause the rock shaft to render said vibratingmechanism operative While said rack and cam are engaged.

22. The combination with a platen moving in one direction, of a deviceto hold a work-piece against the platen and moving in another direction,ribbon vibrating mechanism, means holding said mechanism normallyinoperative, and means arranged to operate with said device during aportion of its movement to render said mechanism operative.

23. The combination with a revoluble platen, of a work-piece holdermounted for movement about tangentially of the platen, ribbon vibratingmechanism, means normally' holding said mechanism inoperative, and meanscontrolled by the work-piece holder in a portion of its movement torender said vibrating mechanism operative.

'Z-l. In a typewriting machine having a revoluble platen and ribbonvibrating mechanism. the combination of a work-piece holder. meansconnecting said work-piece holder with the platen to reciprocate withthe back and forth movements thereof for the respective insertion andline-spacing of a work-piece, and mechanism between said work-pieceholder and ribbon vibrating mechanism whereby the latter is alternatelyrendered operative and inoperative automaticallv in the movements ofsaid workpiece holder.

2.). In a typewriting machine having a carriage with a revoluble platenand ribbon vibrating mechanism, means normally holding said vibratingmechanism inoperative, a workpiece holder on the carriage, a. bell crankmounted upon the machine frame and having an arm to actuate the ribbonvibrating mechanism, said bell crank having an other arm to be actuatedby said work-piece holder, and a swinging bar between said workpieceholder and bell ,crank arm to ctmnminicatc the movement of said holderto said bell crank in various positions of the carriage, whereby thevibrating mechanism may become operative at any desired letterspaceposition upon the work-piece.

26. In a typewriting machine having a carriage with a revolubl platenand ribbon vibrating mechanism, the combination of means normallyholding said vibrating mechanism inoperative, a work-piece holderadapted to reciprocate in the work-piece inserting and advancingmovements of the platen, a bell crank mounted upon the machine framehaving one arm adapted to move said vibrating mechanism into operativeposition, and another arm having a wrist, a rock shaft mounted on thecarriage and having a bar of length equal to the length of thework-piece, said bar engaging said wrist and adapted to move said bellcrank to operate the ribbon vibrating mech' anism in any position of thecarriage, said rock shaft having a cam in the path of said work-pieceholder to be actuated thereby near the end of its work-piece insertingmovement.

27. In a typewriting machine having a carriage with a platen and ribbonvibrating mechanism, means normally holding said vibrating mechanisminoperative, a Work-piece holder having rack bars meshing with gears atthe platen ends to be thereby reciprocated in moving a work-piece backand forth over the printing surface of the platen, a bellcrank havingone arm adapted to engage the ribbon vibrating mechanism to move it intooperative position, and means upon the carriage for ei'igaging its otherarm to actuate said bell crank. said means comprising a swinging barwhose path includes an engaging portion of said bell crank arm, a rockshaft carrying said bar, a cam upon said rock shaft in the path of oneof said rack bars. and a guide upon said rock shaft to rccehe and directthe end of said rack bar against said cam to actuate the latter duringthe last portion of the work-piece in serting movement.

28. In a typewriting machine having a carriage, a revoluble platenthereon and ribbon vibrating mechanism, the combination of means uponthe machine frame holding said mechanism normally inoperative, aworkpiece holder, a connection between said holder and the platen,whereby said holder is moved back and forth with the platen, a bellcrank upon the machine frame in engagement with said vibrating mecha-.nism, and a swinging bar on the carriage controlled by said work-pieceholder during a portion only of the movement of the lat ter, to causesaid bell crank to move said ribbon mechanism into vibrating position.

29. In a typewriti'ng machine having a carriage, a revoluble platenthereon and ribbon vibrating mechanism, the combination of means uponthe machine frame holding said mechanism normally inoperative, aworkpiece holder, a rack thereon in mesh with a gear on the platen,whereby said holder is moved back and forth with the platen, a bellcrank upon the machine frame in engagement with said vibratingmechanism, and a swinging bar on the carriage controlled by said rackduring a portion of the movement of said workpiece holder, to cause saidbell crank to move said ribbon mechanism into vibrating position.

30. In a typewriting machine having a carriage, a revolublc platenthereon, a gear on said platen and ribbon vibrating mechanism, thecombination of means upon the machine frame holding said mechanismnormally inoperative, a work-piece holder, a rack thereon in mesh withsaid gear, Where by said holder is moved back and forth with the platen,a guide for said rack, a bell crank upon the machine frame in engagementwith said vibrating mechanism, and a swinging bar on the carriagecontrolled by' said rack during a portion only of the movement of saidwork-piece holder, to cause said bell crank to move said ribbonmechanism into vibrating position.

31. In a typcwriting machine having a carriage, a revoluble platenthereon, the combination of ribbon vibrating mechanism having auniversal bar, and means holding said mechanism normally inoperative, awork-piece holder movable back and forth with the platen. means arrangedto operate with said workpiece holder during a portion of its movementto render said vibrating mechanism operative. and a type-bar havingmeans for vibrating said mechanism when in its operative condition.

32. In a typewriting machine having a carriage, a revoluble platenthereon, and means for shifting said platen to upper case position, thecombination of ribbon vibrating mechanism operative in both normal andshifted positions of the platen, means holding said mechanism normallyinoperative, a work-piece holder movable back and forth with the platen,and means arranged to operate With said work-piece holder during aportion only of its movement to render said vibrating mechanismoperative.

33. In a typewriting machine having a carriage, a revoluble platenthereon and ribbon vibrating mechanism, the combination of means holdingsaid mechanism normally inoperative, a workiece holder adjustable tosupport Work-pieces of variable widths, a connection between said holderand the platen, whereby said holder is moved back and forth with theplaten, a bell crank upon the machine frame in engage ment with saidvibrating mechanism, and a swinging bar on the carriage coextensive withthe work-piece carried by said holder, said swinging bar controlled bysaid workpiece holder during a portion only of the movement of thelatter, to cause said bell crank to move said ribbon mechanism intovibrating position.

34. In a typewriting machine, the combination with t pe keys, aline-spacing platen and a contro lable ribbonvibrating mechanisln, saidribbon-vibrating mechanism operable by said keys, of means dependentupon the movement of the platen in linespacing direction for controllingthe function of said ribbon-vibrating mechanism at the operation of saidkeys.

35. In a typewriting machine, the combination with a revoluble platenand a normally silenced ribbon-vibrating mechanism, of means dependentupon the rotation of the platen for putting the ribbon-vibratingmechanism into eiiective condition.

36. In a typew'riting machine, the combination with a revoluble platenand a normally silenced ribbon-vibrating mechanism, of means dependentupon the rotation of the platen for putting the ribbon-vibratingmechanism into effective condition, and for subsequently returning theribbon-vibrating mechanism to silenced condition.

ALFRED G. F. KUROWSKI.

Witnesses W. O. VVEs'rrHAL, Trrus H. IRONS.

